* {
    margin: 0;
    padding: 0;
}
a {
    text-decoration: none;
}
/*登录*/
#big{
    height: 600px;
    text-align: center;
}
#gundong {
    width: 700px;
    margin-left: 300px;
}
#gundong span {
    font-size: 30px;
    color: red;
}
/*标题居中*/
.top{
    width: 100%;
    font-size: 30px;
    text-align: center;
}
li {
    list-style: none;
}

#span1{
	display: none;
	font-size: 12px;
	color: red;
}
